• December in Texas Hottest on Record in More Than 130 Years

    The state climatologist says last month was the warmest December since 1889. From Dallas through Abilene to Del Rio, temperatures averaged 5 to 9 degrees above normal.

  • Antarctica’s “Doomsday” Glacier: How Its Collapse Could Trigger Global Floods and Swallow Islands

    Driven by global warming, sea level has risen around 20cm since 1900, an amount which is already forcing coastal communities out of their homes and exacerbating environmental problems such as flooding, saltwater contamination and habitat loss. The massive Thwaites glacier in West Antarctica is similar in size to Great Britain, and it contains enough ice to raise global sea levels by 65cm if it were to completely collapse. The worry is that Thwaites might not be the only glacier to go.

  • Controlled Burning of Natural Environments Could Help Offset Carbon Emissions

    Planting trees and suppressing wildfires do not necessarily maximize the carbon storage of natural ecosystems. A new study has found that prescribed burning can actually lock in or increase carbon in the soils of temperate forests, savannahs and grasslands.

  • What Are the Geopolitical Risks of Manipulating the Climate?

    It would only take one country—watching its crops shrivel or its water run dry—deciding to take a chance to set in motion a global geoengineering climate experiment, and technologies which could, for example, block the sun’s rays or siphon huge amounts of carbon from the air are not that far out of reach. The effects could get out of hand quickly. Yet the international community has not established the kinds of guardrails you might expect for potentially world-changing technologies. As a result, no single governing body is overseeing geoengineering efforts on a global scale.

  • Improving Estimates of Population Exposed to Sea Level Rise: Not as Straightforward as It May Seem

    An analysis of data from 2015 finds that between 750 million and more than a billion people globally resided in the ≤ 10 meters low elevation coastal zone (LECZ), up from 521 million and 745 million in 1990. Understanding the number and location of people living LECZ is necessary for policy makers and communities preparing for and adapting to impacts from sea level rise caused by climate change.

  • 2021’s Climate Disasters Revealed an East-West Weather Divide, with One Side of the Country Too Wet, the Other Dangerously Dry

    Alongside a lingering global pandemic, the year 2021 was filled with climate disasters, some so intense they surprised even the scientists who study them. Many of these extreme weather events have been linked to human-caused climate change, and they offer a glimpse of what to expect in a rapidly warming world. In the U.S., something in particular stood out: a sharp national precipitation divide, with one side of the country too wet, the other too dry.

  • Has Winter Blown Off Course?

    What in the world is going on in the West? Some say that climate change has affected this year’s winter in the Western region of the country, while others are wondering what the lack of snowpack might mean for regional water supply, which is already in a precarious state.

  • Tornadoes and Climate Change: What a Warming World Means for Deadly Twisters and the Type of Storms That Spawn Them

    The deadly tornado outbreak that tore through communities from Arkansas to Illinois on the night of Dec. 10-11, 2021, was so unusual in its duration and strength, particularly for December, that a lot of people including the U.S. president are asking what role climate change might have played – and whether tornadoes will become more common in a warming world. Both questions are easier asked than answered, but research is offering new clues.

  • On the Move: How Nations Address Climate-Driven Migration

    One of the most consequential human responses to climate change is and will continue to be the mass movement of people. Rising temperatures which reduce agricultural opportunities can lead to mass migrations away from struggling communities. As the environmental impacts of climate change increase in scope and severity, more and more people will move to new places to preserve or enhance their lives and livelihoods. How do nations address, and plan to address, the growing wave of migrants fleeing their home countries in search for better living conditions?

  • Feasibility, Cost, and Potential Impacts of Ocean-Based Carbon Dioxide Removal Approaches

    To better understand the potential risks and benefits of removing or sequestering atmospheric carbon dioxide using ocean-based interventions — for example, by cultivating seaweed on a large scale or manipulating nutrients in seawater — the U.S. should undertake a new research program to learn more about how these methods could be used to mitigate the impacts of climate change.

  • California’s Water Supplies Are in Trouble as Climate Change Worsens Natural Dry Spells, Especially in the Sierra Nevada

    California is preparing for a third straight year of drought, and officials are tightening limits on water use to levels never seen so early in the water year. Especially worrying is the outlook for the Sierra Nevada, the long mountain chain that runs through the eastern part of the state. California’s cities and its farms – which grow over a third of the nation’s vegetables and two-thirds of its fruit and nuts – rely on runoff from the mountains’ snowpack for water.

  • Eight Worst Wildfire Weather Years on Record Happened in the Last Decade

    The world’s eight most extreme wildfire weather years have occurred in the last decade. Lower humidity and higher temperatures are driving extreme weather that makes wildfires more frequent and intense.

  • Big Batteries on Wheels: Zero-Emissions Rail While Securing the Grid

    Trains have been on the sidelines of electrification efforts for a long time in the U.S. because they account for only 2 percent of transportation sector emissions, but diesel freight trains emit 35 million metric tons of carbon dioxide annually and produce air pollution that leads to $6.5 billion in health costs, resulting in an estimated 1,000 premature deaths each year. Researchers show how battery-electric trains can deliver environmental benefits, cost-savings, and resilience to the U.S.

  • National Security Consequences of Climate Change

    The consequences of climate change for national security and international stability are numerus and serious. Rising temperatures which reduce agricultural opportunities can lead to mass migrations away from struggling communities. Violent hurricanes and winter storms can disrupt electric grid operations, interrupting access to electricity and other utilities long after the initial climate threat has passed. Researchers are simulating how climate change affects the safety and security of the country.

  • How Climate Change Will Impact National Security

    The recent U.S. National Intelligence Estimate (NIE) lays out the likely security implications over the next two decades of the mounting climate crisis. Calder Walton, the research director at Harvard’s Belfer Center, says: “Let’s start with the basics: that climate change does pose a threat to U.S. national security. The National Intelligence Estimate is a joint assessment produced by the entire U.S. intelligence community, 18 agencies. That’s significant. There are no naysayers; there’s no doubt. So that’s a breakthrough. In this extraordinarily polarized and politicized environment, that is a big milestone itself.”